WO2022265451A1

WO2022265451A1 - Bobbin for slim magnetic component

Info

Publication number: WO2022265451A1
Application number: PCT/KR2022/008628
Authority: WO
Inventors: 이정은; 손인성; 정영환; 길상일; 김기영
Original assignee: 엘지이노텍(주); 주식회사 아모그린텍
Priority date: 2021-06-17
Filing date: 2022-06-17
Publication date: 2022-12-22
Also published as: KR20220168731A

Abstract

The present invention relates to a bobbin that can be used for a slim magnetic component. A bobbin for a magnetic part, according to one embodiment of the present invention, comprises: a first bobbin which has a space for accommodating a magnetic core therein, and which includes a pair of isolation protrusions disposed to be opposite to each other, so as to separate a first region and a second region; and a second bobbin including a coil-loading groove in which a first coil and a second coil are loaded while wound around the first bobbin, and terminals formed on the outside of the coil-loading groove in respective quadrant regions with respect to the coil-loading groove.

Description

Bobbin for slim magnetic parts

The present invention relates to a bobbin usable for slim magnetic parts.

For example, as the slimming of TVs accelerates, slimming of magnetic parts is also greatly demanded, and in order to meet such demands, the mounting area is reduced and the size of parts is gradually being reduced in order to secure price competitiveness.

Illustratively, FIG. 1 is a first bobbin formed in a cylindrical donut shape and accommodating a magnetic material therein, a first coil and a second coil wound on both sides with a central portion of the first bobbin interposed therebetween, and the first bobbin. 1 It is a structure formed separately from the bobbin, and a coil seating groove is formed in the center to accommodate the first and second coils in a wound state on the first bobbin, extends to both sides of the coil seating groove, and has a plurality of terminals installed. A conventional EMI filter including a second bobbin including an extension is shown.

Such a conventional EMI filter, in particular, has the following problems because the terminal portion is concentrated in the direction of each end.

1) It is difficult to secure a sufficient terminal area due to space issues, and as a result, when the terminal size increases, the overall component size increases.

2) There is a limit to miniaturization because the length (w1) in one direction is inevitably relatively large.

The present invention aims to solve at least one of the aforementioned conventional problems.

That is, it aims to provide a bobbin suitable for a miniaturized structure.

A bobbin for a magnetic component according to an embodiment of the present invention includes: a first area having a space for accommodating a magnetic core therein and including a pair of isolation protrusions disposed opposite to each other to divide a first area from a second area; bobbin; and a second bobbin including coil seating grooves in which the first and second coils are seated while being wound on the first bobbin, and terminals formed outside the coil seating grooves in each quadrant region of the coil seating grooves. .

In at least one embodiment of the present invention, the second bobbin includes a pair of extensions extending to both sides in a virtual straight direction connecting the pair of isolation protrusions from the coil seating groove, and each of the extensions In the central portion corresponding to the isolation protrusion, a distance from the coil seating groove to an outermost portion in the imaginary linear direction is smaller than a length of the terminal in the imaginary linear direction.

In addition, in at least one embodiment of the present invention, the length of at least a portion of the extension portion in the imaginary linear direction is greater than the length of the terminal.

In at least one embodiment of the present invention, a second isolation protrusion is formed in the central portion of the extension portion.

In at least one embodiment of the present invention, at least a portion of the second bobbin is formed to be convex outward along the shape of the coil seating groove.

In at least one embodiment of the present invention, each terminal is installed at four corners of the second bobbin.

In at least one embodiment of the present invention, each terminal is installed on the second bobbin while surrounding the upper and lower surfaces of the second bobbin and the side surface between the upper and lower surfaces.

According to the present invention, a bobbin for magnetic parts suitable for miniaturization can be obtained.

Additional effects of the present invention will become apparent to those skilled in the art through the examples of the present invention to be described later.

1 shows an EMI filter as a conventional magnetic component.

2 shows one embodiment of the present invention.

FIG. 3 shows the first bobbin of FIG. 2 .

FIG. 4 shows the second bobbin of FIG. 2 .

*Description of reference number*

10: first bobbin 11: isolation protrusion

20: second bobbin 21: coil seating groove

22: extension part 23: convex part

24: second isolation protrusion

30: terminal 40: first coil

41: (first coil) wire terminal 50: second coil

51: (second coil) wire terminal

Since the present invention can make various changes and have various embodiments, specific embodiments are illustrated and described in the drawings. However, this is not intended to limit the present invention to specific embodiments, and should be understood to include all modifications, equivalents, or substitutes included in the spirit and technical scope of the present invention.

The suffixes "module" and "unit" used in this specification are only used for nomenclatural distinction between components, and are interpreted as premising that they are physically and chemically separated or separated, or that they can be separated or separated in such a way. should not be

Terms including ordinal numbers such as “first” and “second” may be used to describe various components, but the components are not limited by the terms. These terms are only used for the purpose of distinguishing one component from another.

The term "and/or" is used to include any combination of a plurality of items that are the subject matter. For example, "A and/or B" means including all three cases such as "A", "B", and "A and B".

It is understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, but other elements may exist in the middle. It should be.

In the description of the embodiments, each layer (film), region, pattern or structure is "on" or "under" the substrate, each layer (film), region, pad or pattern. The substrate formed on includes all those formed directly or through another layer. In addition, the criteria for "upper/upper" or "lower/lower" are, in principle, based on the appearance shown in the drawings for convenience, unless otherwise stated in the properties or specification of each component or between them. It is used only to indicate the relative positional relationship between elements for convenience, and should not be construed as limiting the position of actual components. For example, “above B” only indicates that B is shown above A on the drawing, unless otherwise stated or when A or B must be located above B due to the nature of A or B, and B in actual products, etc. may be located under A, or B and A may be placed sideways.

In addition, since the thickness or size of each layer (film), region, pattern, or structure in the drawing may be modified for clarity and convenience of description, it does not entirely reflect the actual size.

Terms used in this application are only used to describe specific embodiments, and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly dictates otherwise. In this application, the terms "include" or "have" are intended to designate that there is a feature, number, step, operation, component, part, or combination thereof described in the specification, but one or more other features It should be understood that the presence or addition of numbers, steps, operations, components, parts, or combinations thereof is not precluded.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the related art, and unless explicitly defined in the present application, they should not be interpreted in an ideal or excessively formal meaning. don't

2 shows one embodiment of the present invention.

For ease of understanding, FIG. 2 shows the first coil 40 and the second coil 50 together.

3 is an enlarged view of the first bobbin 10 in which the first coil 40 and the second coil 50 shown in FIG. 2 are wound, and FIG. 4 is an enlarged view of the second bobbin 20 to be.

The first bobbin 10 is formed separately from the second bobbin 20, and a space is formed therein to accommodate a magnetic core (not shown).

The first bobbin 10 has a substantially circular donut shape, and a pair of

isolation protrusions

11a and 11b are formed substantially in the center.

Through the pair of

isolation protrusions

11a and 11b, the first bobbin 10 is divided into a first region (a region where a first coil is wound, which will be described later) and a second region (a region where a second coil is wound, which will be described later). It is divided, and both regions are isolated from the viewpoint of the winding of the first coil 40 and the second coil 50 by the

isolation protrusions

11a and 11b.

The first bobbin 10 may include a lower part having a U-shaped cross section and an upper part having an inverted U-shaped cross section, and may have a structure in which the upper and lower parts are overlapped and coupled after the magnetic core is accommodated therein.

In the first bobbin 10, the first coil 40 is wound in the first region, which is one side region, and the second coil 50 is wound in the second region.

A coil seating groove 21 is formed in the center of the second bobbin 20, and the coil seating groove 21 is in a state in which the first coil 40 and the second coil 50 are wound around the first bobbin 10. It is seated and positioned in (21).

The coil seating groove 21 has a through hole 21a formed in the center, and a seating portion 21b extends outward in a radial direction from a circumferential edge of the hole. It has a structure in which a circumferential wall 21c is formed at a predetermined height.

In addition, the second bobbin 20 extends in the direction of a virtual straight line VL connecting the pair of

isolation protrusions

11a and 11b of the first bobbin 10 from both sides of the coil seating groove 21 . It includes an extension part 22a and a second extension part 22b.

Terminals

30a, 30b, 30c, and 30d are installed at four locations of the

extension portions

22a and 22b on both sides. As shown in FIG. 2, the coils are located in each quadrant region of the coil seating groove 21. The

terminals

30a, 30b, 30c, and 30d are installed outside the seating groove 21. That is, the first terminal 30a is installed in the first quadrant area, the second terminal 30b is installed in the second quadrant area, the third terminal 30c is installed in the third quadrant area, and the fourth terminal 30c is installed in the fourth quadrant area. A terminal 30d is installed. In this embodiment, the

terminals

30a, 30b, 30c, and 30d are provided at four corners of the second bobbin 20.

In the

extension portions

22a and 22b, a central portion corresponding to the

isolation protrusions

11a and 11b may have a narrow distance L1 from the coil seating groove 21 to an outermost portion, and from the central portion to the outermost portion L1. Each of the

terminals

30a, 30b, 30c, and 30d is sufficiently spaced apart from each other, so that there is no spatial restriction on their installation, and the area of the upper or lower surface (mounted surface) of the

terminals

30a, 30b, 30c, or 30d increase is possible

That is, the distance L1 may be smaller than the length L2 of the terminal in the direction of the imaginary straight line VL, and the

terminals

30a, 30b, 30c, and 30d may be formed by extending the

extension portions

22a and 22b. ), it can be installed at a position where the length in the direction of the virtual straight line (VL) is sufficient, so that the entire length (w1') in the direction of the virtual straight line (VL) can be kept compact in the EMI filter.

In addition,

second isolation protrusions

24a and 24b are formed at the center of the

extension parts

22a and 22b, through which the

wire terminals

41a and 41b of the first coil 40 and the wire of the second coil 50 are formed. The

terminals

51a and 51b can be isolated more reliably.

In addition, a pair of wire terminals disposed facing each other with the virtual straight line VL interposed between the

wire terminals

41a and 41b of the first coil 40 and the

wire terminals

51a and 51b of the second coil 50 The

parts

41a and 51a, 41b and 51b come out of the coil seating groove 21 and are connected to

respective terminals

30a, 30b, 30c and 30d.

Each of the

terminals

30a, 30b, 30c, and 30d passes through the second bobbin 20 and is installed while covering the upper, lower, and side surfaces thereof.

On the other hand, in the second bobbin 20, the outer surfaces of both sides of the imaginary straight line VL interposed therebetween are

convex portions

23a and 23b formed at least partially convex outward along the shape of the coil seating groove 21, respectively. ).

In the EMI filter of this embodiment, the total length (w2') in the direction perpendicular to the virtual straight line (VL) is not larger than the conventional structure, but the total length (w1') in the direction of the virtual straight line (VL) is longer than the conventional structure. can be miniaturized.

Claims

a first bobbin having a space for accommodating a magnetic core therein and including a pair of isolation protrusions disposed opposite to divide a first region from a second region; and

A second bobbin including coil seating grooves in which the first and second coils are seated while being wound on the first bobbin, and terminals formed outside the coil seating grooves in each quadrant region of the coil seating grooves.

A bobbin for magnetic parts comprising a.
According to claim 1,

The second bobbin,

A pair of extensions extending from the coil seating groove to both sides in an imaginary straight direction connecting the pair of isolation protrusions;

In each of the extension parts, the central portion corresponding to the isolation protrusion is formed so that the distance from the coil seating groove to the outermost part in the imaginary straight direction is smaller than the length of the terminal in the imaginary straight direction.

Bobbins for magnetic parts.
According to claim 2,

At least a portion of the extension is formed so that the length in the virtual linear direction is greater than the length of the terminal,

Bobbins for magnetic parts.
According to claim 2 or 3,

A second isolation protrusion is formed in the central portion of the extension,

Bobbins for magnetic parts.
According to any one of claims 1 to 3,

The second bobbin,

At least a portion is formed convex outward along the shape of the coil seating groove,

Bobbins for magnetic parts.
According to claim 1,

Each of the terminals is installed at four corners of the second bobbin,

Bobbins for magnetic parts.
According to claim 1,

Each of the terminals surrounds the upper and lower surfaces of the second bobbin and the side surface between the upper and lower surfaces and is installed on the second bobbin,

Bobbins for magnetic parts.